Stars and bars (non-negative integers) (Non-negative integer solutions count: C(n+r−1, r−1) or C(n+r−1, n))
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Non-negative integer solutions count: C(n+r−1, r−1) or C(n+r−1, n)
What each symbol means
| Symbol | What it stands for |
|---|---|
| n,r | Total sum n, number of variables r |
When to use this
Non-negative integers; order of variables fixed.